I bought this for my lady's shave because I'm tired of the razor tips and ingrown hairs. If this is your reason for buying, I would definitely not recommend. I used the shortest protection and still cut the skin. It's too big to fit in the cracks. I can't get a close shave with it, or smooth skin without protection, can't get close enough and still cut you. kinda disappointed with it. I suspect it's the same with the armpits. I would only recommend this for shaving head hair.
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